Five people were killed and ten others, including policemen, were wounded in three successive explosions near police patrols in southern Baghdad on Thursday, a police source said.

"Three roadside bombs went off at about 11:30 a.m. (0830 GMT) near a passing police patrols in the Doura district," the source told Xinhua on condition of anonymity.

The coordinated attack killed five people, including two policemen and wounded ten people, including two policemen, the source said.

Earlier in the day, a suicide bomber struck the al-Mutanabi police station near the Mosul University and a fuel station with a booby-trapped fuel truck in Iraq's northern city of Mosul, causing huge fires.

Twelve people were killed, including two policemen and 25 other were wounded, including five policemen in the Mosul suicide attack, Colonel Abed Hamad al-Juboury, head of the police station told Xinhua by telephone.

Insurgents frequently attack U.S. and Iraqi police forces, accusing them of collaboration with the U.S. occupation.